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Which of the following is the element with whom an element X forming a chloride with the formula $X {Cl}_{2}$ which is a solid with a high melting point will be most likely to be in the same group of the periodic table?

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Mg

Na

Si

Al

answer is B.

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Detailed Solution

Mg

is the element with whom an element X forming a chloride with the formula

X {Cl}_{2}

which is a solid with a high melting point will be most likely to be in the same group of the periodic table.
Since element X forms a chloride

X {Cl}_{2}

, by looking at this formula, we can say that the valency of X is

2

. Now, out of

Na, Mg, Al

and

Si

, the element of valency

2

Mg

. So, X would be in the same group because the elements in the same group have similar valencies.

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